pH changes on dilution

Question 1

what does a pH of 1 have compared to 2?

Answer 1

10 times the concentration of H+ ions as a solution with a pH of 2

Question 2

what has more H+ ions, pH 1 or pH 2?

Answer 2

• pH 1

Question 3

Calculate how many times more hydrogen ions there are in 1dm3 solution of pH3 than a 1dm3 solute ion of pH9.

Answer 3

pH 3 to pH 9 is plus 6
- 1x10^6

Question 4

How would you calculate the pH of the solution of HCl in 25cm3 of 0.050moldm-3 is diluted to 75cm3 with water?

Answer 4

• 75 divided by 3 is 25
• there would be less H+ ions in the 75cm3
• so then you would divide the 0.050 by 3
• 0.01667moldm-3
• pH = -log(0.01667)
• pH = 1.78